<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <script src="/js/spritejs.js"></script>
  <script src="//lib.baomitu.com/dat-gui/0.7.2/dat.gui.min.js"></script>
  <style>
    #adaptive {
      width: 100%;
      padding-bottom: 50%;
      background: #eee;
    }
  </style>
</head>
<body>
  <div id="adaptive"></div>
  <script>
    const {Scene, Sprite} = spritejs;
    const container = document.getElementById('adaptive');
    const scene = new Scene({
      container,
      width: 1200,
      height: 600,
      // contextType: '2d',
    });
    const layer = scene.layer();

    (async function () {
      const sprite = new Sprite({
        anchor: 0.5,
        bgcolor: 'red',
        pos: [500, 300],
        size: [200, 200],
        borderRadius: 50,
      });

      layer.append(sprite);

      await sprite.transition(2.0)
        .attr({
          bgcolor: 'green',
          width: width => width + 100,
        });

      await sprite.transition(1.0)
        .attr({
          bgcolor: 'orange',
          height: height => height + 100,
        });
    }());
  </script>
</body>
</html>
